Hi Glassaddict. I think you are right - it is a biscuit jar by Sowerby's Ellison Glass Works. I'm pretty sure that it is the same one seen on page 3 in the 1930's catalogue (reference CD by Glen & Stephen Thistlewood called Sowerby's Ellison Glass Works Volume Two - George V to Elizabeth II - can be obtained from this website - http://www.geocities.com/Yosemite/Geyser/1799/home.html).